Suds, exactly. When I play I try not to play the wrong notes but you know what, it happens. I just pause, get my fingers ready for the next measure and get on with the song. A good player can do that without people noticing it much.
Polka, I don't know who the manufacturer is but I can find out tomorrow. It's "builder grade" windows and they're really nice and easy to operate. As far as being high-impact, I dunno. I am going to get some plywood and hurricane clips before season starts so when a 'cane comes this way, put 'em up. The 'cane passes, take them down.